Posts Tagged ‘ teaching ’

Leif and Uri need to hang out with a better class of statisticians

November 26, 2014
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Noted psychology researchers and methods skeptics Leif Nelson and Uri Simonsohn write: A recent Psych Science (.pdf) paper found that sports teams can perform worse when they have too much talent. For example, in Study 3 they found that NBA teams with a higher percentage of talented players win more games, but that teams with […] The post Leif and Uri need to hang out with a better class of…

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I (almost and inadvertently) followed Dan Kahan’s principles in my class today, and that was a good thing (would’ve even been more of a good thing had I realized what I was doing and done it better, but I think I will do better in the future, which has already happened by the time you read this; remember, the blog is on a nearly 2-month lag)

November 25, 2014
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As you might recall, the Elizabeth K. Dollard Professor says that to explain a concept to an unbeliever, explain it conditionally. For example, if you want to talk evolution with a religious fundamentalist, don’t try to convince him or her that evolution is true; instead preface each explanation with, “According to the theory of evolution […] The post I (almost and inadvertently) followed Dan Kahan’s principles in my class today,…

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Princeton Abandons Grade Deflation Plan . . .

November 23, 2014
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Princeton Abandons Grade Deflation Plan . . .

. . . and Kaiser Fung is unhappy. In a post entitled, “Princeton’s loss of nerve,” Kaiser writes: This development is highly regrettable, and a failure of leadership. (The new policy leaves it to individual departments to do whatever they want.) The recent Alumni publication has two articles about this topic, one penned by President […] The post Princeton Abandons Grade Deflation Plan . . . appeared first on Statistical…

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Nominal, Ordinal, Interval, Schmordinal

November 18, 2014
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Nominal, Ordinal, Interval, Schmordinal

Everyone wants to learn about ordinal data! I have a video channel with about 40 videos about statistics, and I love watching to see which videos are getting the most viewing each day. As the Fall term has recently started … Continue reading →

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“Patchwriting” is a Wegmanesque abomination but maybe there’s something similar that could be helpful?

November 12, 2014
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Reading Thomas Basbøll’s blog I came across a concept I’d not previously heard about, “patchwriting,” which is defined as “copying from a source text and deleting some words, altering grammatical structures, or plugging in one synonym for another.” (See here for further discussion.) As Basbøll writes, this is simply a variant of plagiarism, indeed it’s […] The post “Patchwriting” is a Wegmanesque abomination but maybe there’s something similar that could…

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Solution to the sample-allocation problem

October 26, 2014
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See this recent post for background. Here’s the question: You are designing an experiment where you are estimating a linear dose-response pattern with a dose that x can take on the values 1, 2, 3, and the response is continuous. Suppose that there is no systematic error and that the measurement variance is proportional to x. You […] The post Solution to the sample-allocation problem appeared first on Statistical Modeling, Causal Inference,…

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Solution to the problem on the distribution of p-values

October 25, 2014
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See this recent post for background. Here’s the question: It is sometimes said that the p-value is uniformly distributed if the null hypothesis is true. Give two different reasons why this statement is not in general true. The problem is with real examples, not just toy examples, so your reasons should not involve degenerate situations such as […] The post Solution to the problem on the distribution of p-values appeared first on…

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Solution to the helicopter design problem

October 24, 2014
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See yesterday’s post for background. Here’s the question: In the helicopter activity, pairs of students design paper ”helicopters” and compete to create the copter that takes longest to reach the ground when dropped from a fixed height. The two parameters of the helicopter, a and b, correspond to the length of certain cuts in the […] The post Solution to the helicopter design problem appeared first on Statistical Modeling, Causal…

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Some questions from our Ph.D. statistics qualifying exam

October 23, 2014
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In the in-class applied statistics qualifying exam, students had 4 hours to do 6 problems. Here were the 3 problems I submitted: In the helicopter activity, pairs of students design paper ”helicopters” and compete to create the copter that takes longest to reach the ground when dropped from a fixed height. The two parameters of the […] The post Some questions from our Ph.D. statistics qualifying exam appeared first on Statistical…

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Three ways to present a probability forecast, and I only like one of them

October 20, 2014
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Three ways to present a probability forecast, and I only like one of them

To the nearest 10%: To the nearest 1%: To the nearest 0.1%: I think the National Weather Service knows what they’re doing on this one. The post Three ways to present a probability forecast, and I only like one of them appeared first on Statist...

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